Method of forming hubs



OCt, 7, W; H. FARR METHOD OF FORMING mnss Filed April 2'7, 1929INVENTOR. WARREN H. FARR.

ATTORNEY.

Patented Oct. 7, 1 930 UNI'TE'D'STATES PATENT.

WARREN HQFAR'R; OF DETROIT, MICHIGAN, ASSIGNOR TO BUDD WHEEL'COMILANY,OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION 01""PENNSYLVANIA METHOD orFORMING nuns,

Application filed April 27,

The field of hub making for automotive Vehicles is that in which myinvention belongs. In this field the manufacturers are confronted withgreat difficulties incident to the formation of long barrels most timesof relatively small external diameter and many times of small internaldiameter. In most if not all hubs the bore extends all the way through,and the hub is over all usually of considerable length. Small externaldiameter brings about diiflculties in forging, the dies are morediflicult to fill and under the high heats resorted to insure fillingand the high pressures, the dies do not stand up so well. Moreover, itis extremely seldom when the internal bores are very considerable thatany part of the interior material can be removed from the bore duringthe forging operation. Most of it needs be removed by machineoperations. Machine operations are, of course, relatively expensive ascompared with forging operations.

It is a principal object of my invention to overcome these difiicultiesso far as possible in connection with a hub of the type I disclose orsimilar types, as my invention has application to other types of hubs aswill be readily perceived.

In the main, the invention is of especial advantage in connection withthe type of hub having a radially extending flange intermediate itsopposite ends. This flange sup ports boththe brake drum and the body ofthe wheel in most cases, and in all cases, supports or partiallysupports the body of the wheel. According to the method of my inventionI forge or draw this flange or a major portion of it integral with thatportion of the hub lying 011 one side thereof, and butt weld thatportion of the barrel of the hub lying on the opposite side thereof tothe cornice formed bythe angle between the integrally formed flange andbarrel. More in de-, tail, I form such a hub initially in two partsdivided at the root of the flange on a substantially conical surface atan acute angle to the axis of the hub in such manner that that portionof the barrel of the hub lying on one side of the hub is formedintegrally with the flange and thereafter butt weld the 1929. seri r tb.355,523.

two separately'formed parts together by abutting them on' the surface ofthe division.

In the drawings I show in. axial cross sec tion such a hub in Figs. 1and2, Fig; 2 being a slight modification, in Figs. 3 and iplan and axialsections of a stamping from which one part is formed, in Figs. 5 and 6,axial sectionsof' this part in final form, Fig; 6 be ing amodification,and in Figs. 7 and-'8 axial sections of a forging from which the otherpart is formed.

The barrel. B is shown divided into two portionsan outer portion B andanfinner portionB The division is on a conical concentric surface. S atan acute angle tothe axis of the hub and so related to the root R ofradially 'extending flange F that'this flange remains with the innerbarrel B of the portion.

In the particular embo dimentshown the outer portion B 'ofthe barrel isof smaller diametergboth externally andinternally than the innerportionB' Thepiortion B emanates from"flanger'Fintermediate its'root R and itsperimeter; The root. R is divided alongthe surface Sfrom the mai'n bodyof the flange-F and may be formedintegrally with the outer portion ofthe barrel B Thus ,the-initial steps of my method comprise the separateformation of a part B R and the part B The part 'B, R is preferably'forged, beingof relatively heavy mass and having a relativelylong barrel portion B The surface Smaybe formed eitherby the forging,operation" initially and then cleaned off by grinding fo'r'the weldingoperation. B 2", F is initially formed as a die stamping, thebarrelportion.B beingof such large diameter and the gauge of the metalbeingre lativelylighter so that iticanbe eiflcientlyfformed by diesta'mpings (See Figs. to 6i) But it 'maylalso be formed by forging'eitlier hot or cold. It needs but little if any machining followingsuch operation. The cornice formed bythe angle between the elementsB andF of this part may be beveled by the initial forming operation andsubsequently ground. or machined for the forging operation,. (see F igs.g2 and 6) or it maybe presented for the '1 forging operation inst as itcomes from the forging machine with the cornice either rounded orbeveled complemental to all or a portion of the surface S. (See Figs. 1and 5.) I have found that a rounded cornice makes a good weld. Anyrelative shaping of the opposed surfaces to be butt welded known to begood practice in the art may be resorted to by subsequent cutting orcleaning processes.

The parts B R and B F so formed are then abutted upon the complementalor at least coacting surfaces S and butt welded through any of the wellknown butt welding processes. A thoroughly homogeneous weld results as Ihave shown by actual tests and microscopic examination. A fully accurateand more than adequately strong hub structure is produced as I haveshown by subjecting it to mechanical tests.

There are had, as a result, all of the advantages I have hereinabove setforth, including economy in dies, and economy in machining operations.

What I claim as new and useful and desire to protect by Letters Patentis:

1. The method of forming hubs the bodies of which are provided withradial flanges intermediate their ends which consists in separatelyforming the body and the flange, forming a beveled seat on the bodyhaving an acute angle to the axis of the hub, and butt Welding togetherthe flange and the beveled seat.

2. The method of forming hubs having barrel port-ions of differentdiameter and radially extending flange portions intermediate the endsthereof and interconnecting the barrel portions which consists inseparately forming the hub in parts divided in that portion of theflange intermediate the two barrel portions of different diameter, andthereafter butt welding the said two parts together.

3. The methodof forming hubs the body portions of which have radiallyextending flanges intermediate their ends which consists in forming thebarrel in separate parts whereby one part so separately formed car riesthe flange and is of angle cross section, beveling the adjoining end ofthe other part at an acute angle to the axis of said last mentioned partand butt welding the cornice of the angle section of the first mentionedpart to the beveled end of the last mentioned part.

4. The method of forming hubs the bodies of which are provided withradial flanges intermediate their ends which consists in employing aflat plate and a tubular barrel portion, forming a tubular portion onsaid plate, bevelling the edges of said plate and said barrel, and buttwelding said bevelled edges together.

5. The method of forming hubs the bodies of which are provided withradial flanges intermediate their ends which consists in employing aflat plate and a tubular barrel portion, forming a tubular portion onsaid plate and the tubular portion thereon, and butt welding saidbevelled edges together.

In testimony whereof he hereunto aflixes signature. 0

WARREN H. FARR.

